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Number Theory Essentials

Mathematics

Fundamental concepts of number theory including primes, factors, and divisibility.

number theory mathematics education

8 Questions Easy Ages 13+ Sep 29, 2026

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About this Study Set

This study set covers Mathematics through 8 practice questions. Fundamental concepts of number theory including primes, factors, and divisibility. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 8 questions from the Number Theory Essentials study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which of the following numbers is defined as a prime number?

A 1
B 2
C 9
D 15

2 What is the greatest common divisor (GCD) of 12 and 18?

3 Which of these numbers is a perfect square?

A 10
B 20
C 30
D 49

4 What is the smallest composite number?

5 A number is divisible by 5 if it ends in which digits?

A 0 or 5
B 1 or 5
C 2 or 5
D 3 or 5

6 What is the result of 2 raised to the power of 3?

7 Which of the following is an example of an odd number?

A 12
B 24
C 37
D 48

8 What is the sum of the first three prime numbers?

A 6
B 8
C 10
D 12

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